Signaling device.



PATENTED MAY 22, 1906.

N. A. BUTLER. SIGNALING DEVICE. APPLICATION FILED AUG. 4. 1905.

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NEAL A. BUTLER, OF HAMPTON, VlRGINlA,-ASS1GNOR OF ONE-HALF TO W. H. BOYENTON, OF HAMPTON, VIRGINIA.

S'lGNALlNG DEVICE.

zen of the United States, residing at Hampton, in the county of Elizabeth City and State-of Virginia, have invented certain new and useful Improvements in Signaling Devices, of which the following is a specification.

My invention relates to improvements in thermo-electric si naling devices, and is particularly applicable for the purpose of giving a warning or signaling the presence of excess ive heat.

The object of the invention is the provision of a device of this character to be used especially in tobacco-warehouses and sim lar places for the purpose of calling the attentlon of an attendant to the presence of anundesirable and sometimes dangerous excessive tem erature of the air in the building.

T e device, being automatic, requires no special attention and by its construction is accurate, reliable, and efficient, and as it is simple in construction, cheap in first cost, and inexpensive of maintenance the device will recommend itself as a desirable fixture for the purpose intended.

The invention consists, essentially, of a thermometer adapted for use in this connection and rovided with a lun er which is movable in the tube of t e t ermometer. The lunger is raised and lowered by the rise and tall of the mercury in the tube caused by the chan es in temperature of the atmosphere in the place where the device is located, and the plunger is operatively connected with a contact-point located in proximity to a second contact-point, andas these points are electrically connected with abellor other signal in the circuit when the circuit is completed through the contact-points the bell or signal is operated.

' The invention further consists in certain novel features of construction and combinations and arrangements of arts, as hereinafter specified, more particullarly pointed out in the claims, and as illustrated in the accompanying drawings, which form a part of this specification.

Referring to the drawings, Figure 1 is an elevationof a thermometer adapted for use with my invention, showing also the operative connections for the signaling device and the electric circuit in diagram, some of the Specification of Letters Patent. Application filed August 4, 1905. Serial No. 272,660. I

Patented May 22,1906.

parts of the device being broken for convenience iniilustration. Fig. 2 is a view of the plunger and plunger-rod detached;

In the physical embodiment of my invention I employ the ordinary thermometertube 1 and provide the same with an enlar ed bulb or reservoir 2, which, as usual, is-fil ed with mercury. Straps 3 3 3 of usual pattern are used to secure the glass tube and bulb to thebase 4, as is customary. The usual thermometrical readings are designated onthe base 4, and these readings may be varied to suit the circumstances required in any given case to ada t the device to differentuses.

Within the tube 1 I locate the plunger 5. This plunger 5 is movable up and down in the tube, but fits with a neat and smooth passage therein. The plunger-rod has a rod 6 pivotally connected at its head, and the rod 6 is in turn pivotally connected to the link 7. Above the plunger-rod and link is located the lever-arm 8, also pivotally connected with the link 7, and this arm 8 is provided at its end opposite the link' connection with a contact point or leg 9 and head 10. This head 10-is adapted to form one of the contactpoints of the electric signaling-circuit, and the rod 8 is movable on its plvot 11. The second contactoint of the circuit is vertically and latera ly adjustable to adapt itself to the swing of the pivoted lever 8. The screw 12 may be adjusted to the desired position verticall by turning within the sleeve 13, which is 0 course threaded complementary to the screw.. The sleeve 13 is provided with wings 14 14, and these wings have passed through them clamping or binding screws 15, which are forthe purpose of adjusting the sleeve and screw latera ly. A base-plate 16, having a slot 17 throu h which the screws 15 pass, provides for the ateral movement and adjustment of the sleeve and screw.

The electric signalin -circuit is completed from the contact-leg 9 y wire 18 to the bell 19. A second wire 20 connects the bell with the battery 21, and the battery is in turn connected'by wire 22 with the second contact point or screw 12.

The modus operandi of the device is as follows: Assuming the temperature oi the atmos here in the compartment to rise above a pre etermined height and the connections and contact-points being adjusted to become operative at the point reached, the rise of the vious mercury in the tube 1 will lift the plunger 5 and raise the rod 6, link 7, and the left end of rod or lever 8. l/Vith the movement of the rod 8 the right end is turned downwardly, and the contact-head l0 swings down and touches the point of the screw circuit. With the closing of the electric circuit the bell 19 is operated, as usual, and will continue to ring as long as the temperature remains at an excessive point or the battery runs out, thus warning the attendant and at tracting attention to the necessity for reducin the temperature of the compartment.

i rom the fore oing description, taken in connection with t e drawings, it becomes obthat I have produced a device which will fulfil all the requirements as set forth for the purpose of my invention.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination with a thermometer and plunger therein, a pivoted lever, a rod and link connecting the lever and plunger, a contactpeint on the lever, of a slotted plate, a sleeve adjustably secured thereto, and a screw in the sleeve adapted to be contacted by the first point.

2. The combination with a thermometer, a plunger therein, a lever connected with the 12, closing the plunger and having a contact-point, of a slot ted plate and a sleeve adjustably secured thereto, a contact-screw in the sleeve, and an electric circuit and signaling device between the two contact-points.

3. The combination with a thermometer having a plunger mounted therein, a pivoted lever, a rod and link connecting the same, a contact-point on the lever, a second contactpoint consisting of a screw and sleeve, a slotted plate and adjusting-screw for attaching the sleeve to said plate, and an electric circuit and signal between said points.

4. The combination with a pivoted lever and link secured thereto, a contact-point on the lever, a second contact-point consisting of a screw and sleeve, a slotted plate to which the sleeve is adjustably secured, an electric circuit containing a signal connected between the contact-points, athermometer having an enlarged bulb, a plunger in the tube thereof,- said plunger connected with the link of the lever.

In testimony whereof I a 122 my signature in presence of two witnesses.

NEAL

BUTQER. /Vitnesses HI. PARKINs,

Mi. E. Moons. 

